Specifications

7-37
Softkey Menu Descriptions
Error Location
Error Location
Path
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Description
Error location enables the user to define a specific bit in a RAM-based pattern and then
make measurements at that location. The specific bit is known as the BER location and
can be specified by the user. Error location has three forms as follows:
•BitBER
• Error location capture
•BlockBER
The softkeys are as follows:
Use this key in conjunction with the numeric keypad to specify
the BER location.
Pressing this key instructs the instrument to search for an error.
If it finds an error it reads the errors location to the BER location
and initiates gating. The instrument may or may not be gating
when the measurement is initiated. In either case gating starts/
restarts after the new BER location is received. After an error is
located the instrument displays:
BIT: Error Address nnn
Data window xxxx xxxx xxxx xxxx xxxx xxxx xxxy xxxx
• xxx... - pattern around error, 28 bits before error and 3 bits
after error are displayed.
• y - errored bit in inverse video
An error is only captured once for each measurement - each time
CAPTURE ERROR is pressed.
Pressing this key selects a Block BER measurement and enables
the and keys which set the
parameters for a Block BER measurement. Block BER measures
the BER of a range of bits in the pattern. It replaces normal BER
measurements. Blocks of bits must be a multiple of 32 bits, with
the block specified by a start location.
Use this key to select the start location for the block of bits.
Use this key to set the length of the block of bits. The length
must be a multiple of 32 bits with the start location specified.
error locat’n MENU
error locat’n
error locat’n
BIT ERR ADDRESS
CAPTURE ERROR
BLOCK BER
BLOCK START BLOCK LENGTH
BLOCK START
BLOCK LENGTH